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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 04:34:11 +08:00
linux-next/include
Shaohua Li 45cac65b0f readahead: fault retry breaks mmap file read random detection
.fault now can retry.  The retry can break state machine of .fault.  In
filemap_fault, if page is miss, ra->mmap_miss is increased.  In the second
try, since the page is in page cache now, ra->mmap_miss is decreased.  And
these are done in one fault, so we can't detect random mmap file access.

Add a new flag to indicate .fault is tried once.  In the second try, skip
ra->mmap_miss decreasing.  The filemap_fault state machine is ok with it.

I only tested x86, didn't test other archs, but looks the change for other
archs is obvious, but who knows :)

Signed-off-by: Shaohua Li <shaohua.li@fusionio.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-09 16:22:47 +09:00
..
acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-10-08 07:14:06 +09:00
asm-generic thp: introduce pmdp_invalidate() 2012-10-09 16:22:29 +09:00
clocksource arm64: Generic timers support 2012-09-17 13:42:20 +01:00
crypto
drm Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2012-10-07 21:13:54 +10:00
keys
linux readahead: fault retry breaks mmap file read random detection 2012-10-09 16:22:47 +09:00
math-emu
media Merge branch 'exynos-drm-next' of git://git.infradead.org/users/kmpark/linux-samsung into drm-next 2012-10-07 21:06:33 +10:00
memory
misc
mtd
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-10-06 03:11:59 +09:00
pcmcia
ras
rdma IB/core: Add ib_find_exact_cached_pkey() 2012-09-30 20:33:30 -07:00
rxrpc
scsi Prepared for main script 2012-10-03 13:45:43 -07:00
sound Sound updates for 3.7-rc1 2012-10-09 07:07:14 +09:00
target
trace mm: remove __GFP_NO_KSWAPD 2012-10-09 16:22:15 +09:00
uapi UAPI: (Scripted) Disintegrate include/drm 2012-10-04 18:21:50 +01:00
video ARM: clps711x: Remove board support for CEIVA 2012-09-28 21:14:08 +02:00
xen Features: 2012-10-07 07:13:01 +09:00
Kbuild